Which action(s) will decrease the equilibrium concentration of a non-reacting gas in water?

Question

1. decreasing the temp. of the water
2. decreasing the volume of water
3. decreasing the pressure of the gas above the liquid

a. 1 only
b. 2 only
c. 3 only
d. 1 and 3
e. 1, 2, and 3

Answer 1

1. decreasing the T of the water usually allows more gas to dissolve.
2. decreasing the volume of water will decrease the amount of gas proportionally but the concn will stay the same.
3. decreasing the pressure of the gas above a liquid will decrease the concn of the gas in the liquid. Henry's Law.

Answer 2

so the answer is 3 only?

Answer 3

That's what I think.